Professional Grade 1/4″ X 5/8″ X 18″ Starrett Precision Ground Flat Stock AISI O-1 Oil Hardened Steel 58904

1/4″ X 5/8″ X 18″ Starrett Precision Ground Flat Stock | AISI O-1 Oil Hardened Steel | 58904 is Starrett precision ground flat stock, supplied ground flat, square and parallel in aisi o-1 oil hardened steel so it goes straight into layout, fixturing and machining work without further surfacing.

Two faces precision ground to create true flat surfaces suitable for reference, milling, drilling, and grinding setups.

Constructed from AISI O-1 oil-hardened steel for reliable machinability and post-fabrication strength.

Single-piece stock reduces misalignment and wobble when used in fixtures, jigs, or tooling plates.

Ideal for tool and die work, fixture construction, and general metalworking where consistent flat stock is required.

Specifications

Size: 1/4 inch thick x 5/8 inch wide x 18 inch long

Material: AISI O-1 oil-hardened steel

Finish: Precision ground

Overall length: 18 inch

Width: 5/8 inch

Thickness: 1/4 inch

Surface: Ground to a true flat plane on the work faces

Applications

Machine shops and tool and die makers for blanks, fixtures, and reference surfaces

Metal fabrication and prototyping environments needing dependable flat stock for jigs and dies

Educational labs and training facilities focused on basic metalworking and tooling assembly